1. RIKEN Center for Emergent Matter Science; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
2. RIKEN Thin-film Device Laboratory; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
3. Japan Science and Technology Agency; PRESTO, 4-1-8, Honcho, Kawaguchi Saitama 332-0012 Japan
4. Electrical and Electronic Engineering and Information Systems; The University of Tokyo; 7-3-1 Bunkyo-ku, Tokyo 113-8656 Japan